For another playgroup choice, have you considered Geo on Caine Road? Went in one day for a tour and the facility is brand new and felt very warm and friendly in there. I heard the good teachers from Woodland work there now.
HI Samantha, South Horizon is not too far from Belair. IMS is there. You have missed their application deadline though and it has a long waiting list, but it never hurts to ask. IMS is a feeding school of a lot of the international schools. They, themselves has a campus in Stanley for primary school.